glutSpaceballMotionFunc sets the Spaceball motion callback for the current window.

Usage

void glutSpaceballMotionFunc(void (*func)(int x, int y, int z));

func

The new entry callback function.

Description

glutSpaceballMotionFunc sets the Spaceball motion callback for the
current window. The Spaceball motion callback for a window is called when the
window has Spaceball input focus (normally, when the mouse is in the window)
and the user generates Spaceball translations. The x, y, and z
callback parameters indicate the translations along the X, Y, and Z axes.
The callback parameters are normalized to be within the range of -1000 to 1000
inclusive.

Registering a Spaceball motion callback when a Spaceball device is not available
has no effect and is not an error. In this case, no Spaceball motion callbacks
will be generated.

Passing NULL to glutSpaceballMotionFunc disables the generation of
Spaceball motion callbacks. When a new window is created, no
Spaceball motion callback is initially registered.